Java tutorial
/** * Abiquo community edition * cloud management application for hybrid clouds * Copyright (C) 2008-2010 - Abiquo Holdings S.L. * * This application is free software; you can redistribute it and/or * modify it under the terms of the GNU LESSER GENERAL PUBLIC * LICENSE as published by the Free Software Foundation under * version 3 of the License * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * LESSER GENERAL PUBLIC LICENSE v.3 for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ package com.abiquo.server.core.infrastructure.management; import java.util.List; import javax.persistence.EntityManager; import org.hibernate.Criteria; import org.hibernate.criterion.Criterion; import org.hibernate.criterion.Order; import org.hibernate.criterion.Restrictions; import org.springframework.stereotype.Repository; import com.abiquo.server.core.cloud.VirtualDatacenter; import com.abiquo.server.core.cloud.VirtualMachine; import com.abiquo.server.core.common.persistence.DefaultDAOBase; import com.abiquo.server.core.common.persistence.JPAConfiguration; import com.abiquo.server.core.infrastructure.storage.DiskManagement; import com.abiquo.server.core.infrastructure.storage.VolumeManagement; @Repository("jpaRasdManagementDAO") public class RasdManagementDAO extends DefaultDAOBase<Integer, RasdManagement> { public RasdManagementDAO() { super(RasdManagement.class); } public RasdManagementDAO(final EntityManager entityManager) { super(RasdManagement.class, entityManager); } private static Criterion sameResourceType(final String idResourceType) { return Restrictions.eq(RasdManagement.ID_RESOURCE_TYPE_PROPERTY, idResourceType); } private static Criterion sameVirtualDatacenter(final VirtualDatacenter virtualDatacenter) { return Restrictions.eq(RasdManagement.VIRTUAL_DATACENTER_PROPERTY, virtualDatacenter); } private static Criterion sameVirtualMachine(final VirtualMachine virtualMachine) { return Restrictions.eq(RasdManagement.VIRTUAL_MACHINE_PROPERTY, virtualMachine); } @SuppressWarnings("unchecked") public List<RasdManagement> findByVirtualDatacenterAndResourceType(final VirtualDatacenter virtualDatacenter, final String resourceType) { return createCriteria(sameVirtualDatacenter(virtualDatacenter), sameResourceType(resourceType)).list(); } public List<RasdManagement> findByVirtualMachine(final VirtualMachine virtualMachine) { return getResultList(createCriteria(sameVirtualMachine(virtualMachine))); } public List<RasdManagement> findDisksAndVolumesByVirtualMachine(final VirtualMachine virtualMachine) { Criteria crit = createCriteria(); crit.createAlias(RasdManagement.RASD_PROPERTY, "rasd"); // Add disk resource type filter crit.add(Restrictions.in(RasdManagement.ID_RESOURCE_TYPE_PROPERTY, new String[] { VolumeManagement.DISCRIMINATOR, DiskManagement.DISCRIMINATOR })); // Add virtual machine filter crit.add(sameVirtualMachine(virtualMachine)); // Order by generation (attachment order) crit.addOrder(Order.asc("sequence")); return getResultList(crit); } public void enableTemporalOnlyFilter() { JPAConfiguration.enableOnlyTemporalFilters(getEntityManager()); } public void restoreDefaultFilters() { JPAConfiguration.enableDefaultFilters(getEntityManager()); } }